Repeat the test mentioned above specifically and try to figure out what's wrong in the context of the test. Form#setTextField is stable nowadays. If not reproducible, close the ticket.
Form#setTextField sometimes fails to clear the existing text in the text field, which results in the new text being appended to the existing one.
Calling Form#setTextField("bynder230.png") on the Asset name text field sets the text to bynder.pngbynder230.png.
The text should be set to bynder230.png
Run DamBynderUITest#uploadDownloadEditDeleteBynderAsset multiple times until this happens. Doesn't always reproduce.
The problem seems to be specific to the asset upload dialogue for Bynder assets: it automatically sets an asset name upon upload whereas uploading Magnolia assets leaves the asset name field blank.